They don't even like the U.N. A large section of populace absolutely takes offense to the idea that we (America) need to follow someone elses' (Rest of the planet) lead. Europe, outside the U.K., are a regular source of derision.

Can't really psychoanalyze the Why, but it's pretty clear the stint as a lone superpower has left a stigma with following any other country, especially with the older section of the population.